Search found 61 matches
- 18 Aug 2021, 13:11
- Forum: Tutorials/How-To's
- Topic: How to convert a book to serchable pdf using open source software
- Replies: 33
- Views: 166551
Re: How to convert a book to serchable pdf using open source software
Well, actually I am not able to say, what is wrong. I expect that my lack of abilities is reason for that. When I try to install 'archive-hocr-tools' I have this error message: $ python3 -m pip install setup.py Defaulting to user installation because normal site-packages is not writeable ERROR: Coul...
- 19 Jul 2021, 12:05
- Forum: Tutorials/How-To's
- Topic: How to convert a book to serchable pdf using open source software
- Replies: 33
- Views: 166551
Re: How to convert a book to serchable pdf using open source software
Nice to see that. I sought for free implementation of MRC and apparently here it is. Unfortunately, I was not able to test the program due to some dependency issues. Nevertheless, it looks very promising. Thank you for sharing info about this software with me.
- 26 May 2021, 05:14
- Forum: Lighting
- Topic: LED lamps 'Warm' or 'Cold' light - Does it matter?
- Replies: 7
- Views: 9720
Re: LED lamps 'Warm' or 'Cold' light - Does it matter?
I would like to suggest rather "neutral" white (4600K) instead of "warm" or "cold" white light source. That is definitely less problematic and gives good results with standard white balance algorithms in smartphone cameras. I tried also "warm" white LEDs (2700...
- 31 Jan 2021, 10:51
- Forum: Scan Tailor
- Topic: Combining Split output into PDF
- Replies: 9
- Views: 10095
Re: Combining Split output into PDF
What I don't understand, better, I don't know is how to achieve the 2 passages after scantailor: PDF size 50% JPEG -G4 and PDF at 150dpi scaling (I am on linux). Can you explain me what have I to do? What do you mean by 'PDF size 50% JPEG -G4'? Do you want to have JPEG compression applied to color ...
- 22 Jan 2021, 08:02
- Forum: Scan Tailor
- Topic: Combining Split output into PDF
- Replies: 9
- Views: 10095
Re: Combining Split output into PDF
Adobe Acrobat in more recent versions does a good job with Scan Tailor output and creates such 'optimized' pdf files, where color and b&w content is segmented and compressed separately. The result seems to me to be similar to Abbyy FineReader MRC compression model.
- 26 Nov 2020, 07:57
- Forum: Tutorials/How-To's
- Topic: How to convert a book to serchable pdf using open source software
- Replies: 33
- Views: 166551
Re: How to convert a book to serchable pdf using open source software
Actually, each book created by me using the described method has a colored front cover and back cover. Contents between covers are binarized (B&W). There may be added pictures in color, but it would be necessary to manually convert them to appropriate format and turn into pdf, and afterwards ins...
- 24 Nov 2020, 15:40
- Forum: Scan Tailor
- Topic: output dimensions ratio
- Replies: 2
- Views: 5229
Re: output dimensions ratio
In the bottom part, near the right-hand corner you have information on dimensions of the image. Width and height may be adjusted at the 'Margins' stage. You may change units by selecting 'Tools' and 'Units'.
- 14 May 2020, 14:21
- Forum: Tutorials/How-To's
- Topic: How to convert a book to serchable pdf using open source software
- Replies: 33
- Views: 166551
Re: How to convert a book to serchable pdf using open source software
My bad. I was convinced that OCRmyPDF supports jbig2 but apparently this applies only to regular pdfs.
- 06 May 2020, 09:34
- Forum: Tutorials/How-To's
- Topic: How to convert a book to serchable pdf using open source software
- Replies: 33
- Views: 166551
Re: How to convert a book to serchable pdf using open source software
Thank you for your comments and sharing details of your workflow. Nice to see, that someone found useful the thread I wrote. First I think the cover should be at the same size when scrolling the pdf file. I had some problem since I scanned the covers at higher resolutions. You are right. The scripts...
- 22 Feb 2020, 19:06
- Forum: Tutorials/How-To's
- Topic: From tiff-scans, ScanTailor and Tesseract to djvu-files - how?
- Replies: 2
- Views: 6756
Re: From tiff-scans, ScanTailor and Tesseract to djvu-files - how?
By far the most time consuming part is the OCR. I am wondering, if the -j option from ocroodjvu would speed this up (number of OCR threads)? Is there a relation between the threads and the cpu-cores. What amount of threads would be meaningful (I have an AMD cpu with 6 cores, and an nivida GPU) I gu...